EP 0349406 A1 19900103 - Process for the industrial manufacture of aqueous solutions of glyoxylic acid.
Title (en)
Process for the industrial manufacture of aqueous solutions of glyoxylic acid.
Title (de)
Verfahren zur Industrieproduktion der Wasserlösungen von Glyoxylsäure.
Title (fr)
Procédé de fabrication industrielle de solutions aqueuses d'acide glyoxylique.
Publication
Application
Priority
FR 8808957 A 19880701
Abstract (en)
Preparation of glyoxylic acid, carried out by oxidising an aqueous solution of glyoxal which has a pH lower than 1 with molecular oxygen in the presence of nitrous oxide as catalyst. <??>This process allows the initial glyoxal to be converted practically quantitatively into glyoxylic acid in a good yield.
Abstract (fr)
L'invention concerne la préparation d'acide glyoxylique. On y parvient en oxydant une solution aqueuse de glyoxal ayant un pH inférieur à 1 avec d l'oxygène moléculaire en présence de monooxyde d'azote comme catalyseur. Ce procédé permet une transformation pratiquement quantitative du glyoxal de départ avec un bon rendement en acide glyoxylique.
IPC 1-7
IPC 8 full level
B01J 27/24 (2006.01); C07B 61/00 (2006.01); C07C 51/235 (2006.01); C07C 51/27 (2006.01); C07C 59/153 (2006.01)
CPC (source: EP US)
C07C 51/235 (2013.01 - EP US); C07C 51/27 (2013.01 - EP US)
C-Set (source: EP US)
Citation (search report)
- [A] US 2298387 A 19421013 - KENYON WILLIAM O, et al
- [A] GB 2001621 A 19790207 - POLLUTION PREVENTING RES
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0349406 A1 19900103; EP 0349406 B1 19920318; AT E73755 T1 19920415; DE 68901011 D1 19920423; ES 2030285 T3 19921016; FR 2633615 A1 19900105; FR 2633615 B1 19910412; GR 3004105 T3 19930331; JP 2761761 B2 19980604; JP H0363245 A 19910319; US 5091566 A 19920225
DOCDB simple family (application)
EP 89401809 A 19890626; AT 89401809 T 19890626; DE 68901011 T 19890626; ES 89401809 T 19890626; FR 8808957 A 19880701; GR 920400460 T 19920319; JP 16971089 A 19890629; US 37481889 A 19890703